thumb|Composer Sebastian Fagerlund Sebastian Fagerlund (born 6 December 1972) is a Finnish composer. He is described as “a post-modern impressionist whose sound landscapes can be heard as ecstatic nat
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fee0179d23fbfb5b37dfc9eb81c31350b87c433320e3db3e6424c8bb8a52a0. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f597916c-769b-44b8-95b0-df667d4bb2b7.json and https://artists.proofprofile.net/proofs/artist/f597916c-769b-44b8-95b0-df667d4bb2b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Terral, Strings to the Bone, Chamber Symphony
Sebastian Fagerlund: Cello Concerto "Nomade" & Water Atlas (Live)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15cc019a86d25ed84e73e2882611f7d0d19154dc021627b27684595a4d26851. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIPKY0600004.
Sebastian Fagerlund: Drifts, Stonework & Guitar Concerto "Transit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e9d957e8dea177f4a49a24cbcff406a453da92c901f204bfbf3a99d5e51d7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1795010.
Fagerlund: Octet ‘Autumn Equinox’: III. Agitato con forza ma espressivo
Octet "Autumn Equinox": I. Espressivo – Ritmico, poco leggiero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b1365c30d7db69ec5a243ad89dae995d9243415eb8b36a5e603714e016660. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV2490010.
Octet "Autumn Equinox": II. Lento misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa831eea9574f08bd74d50a45d1d0daf0991345e01c5356a06ded311155f10dc0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV2490020.
Octet "Autumn Equinox": III. Agitato con forza ma espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9c997d78ccb6a6fda7335792ab5ec2d5ab3f7362893c3ea44d6cac31af385. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV2490030.
Arcantio (Concerto for Double Bass and Chamber Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af71794ee75de877b69c4d32d427b19f75faed44827b454fefa0a57b63fd9a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV2490040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03229306b51d474449d47d81b553dfedd46801e4e0a8035d720ecfd4817e8dbb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV2490050.